PARTULA GIBBA, GUAM. 93 
diminish during the period of collection, while furthermore the negative correlation 
between the number of eggs and the lapse of time would be greater than that be- 
tween the total contents and the latter datum. It is possible, therefore, that the 
animals of this species respond even more readily than do those of radiolata to 
the increased temperature and greater humidity of the late spring months. The 
facts as observed do not demonstrate this as opposed to the possibility that the 
animals reproduce indifferently throughout the year, and the data are in accord 
with either hypothesis. But the former conclusion is preferable on general grounds 
and because it is established in the analogous case of radiolata. 
TABLE 45.—Partula gibba, Guam. Statistics of fecundity. 























































































Gravid. Embryonic contents. | Average for gravid. 
Aver- 
Locality. Date Rec- age 
(1920.) ords. Per Total; for 
No. cent. | Eggs. |Young.| Total. | Eggs. | Young! con- all. 
| tents. 
fd Rts te ae teil |r etal ese tt [a Bios 
PR EAR TIO Ne cise se Aciwans Ate 2 15 292 222 | 76.03 260 288 543) f 1 Vie i230 | 2:47 
BantaeR OSA o.-< hint .a te Jalyol oe, ce 68 66 | 97.06 134 75 209 ie ZV03> let 14) | Shue 
SACOG hte. ina ee. AMM OLO i ae as 140 122 | 87.14 147 130 2TH A. 20 We 4500 | feed 
POO aes eisict ks Be ches July 7 218 201 | 92.20 301 219 S20 2 eoOrl le O9uh2o09) 
Barrigada ooo ccs AFL al Wee 187 153 | 81.82 252 142 394 | 1.65 | 0.93 | 2.57 
Pededoy. ewer. ch. oats UFRLLY, Seacdie its c.si 72 69 | 95.83 161 97 25S) hee co lelee) 3.74 
RTI bes. clone he garc ah teeta: July Pla sas. 102 87 | 85.29 159 114 oF a ith RES YO UR 3 at ea 8 
ERUCIO cere cs oat MMe Si cts 1 Ip 10 | 83.33 23 12 35. 1° 2,.30 | 1220). 350 
LS OO DET sie sie oeueke 3 RLY 2occch 6 < 120 100 | 83.33 237 105 S42 2 oe ees | 42 
Pago euOrths ss /o.0).ters ae ANG Pons aie, ae 70 59 | 84.28 124 62 £36 je2, LO niet OS on 3515 
LRT es ae eiepune 30 5 6. cn il 13 | 76.47 34 19 53 | 2.61 | 1.46 | 4.08 
eee eee Ae et \ 27 26 | 96.29 62 35 97 | 2.38 | 1.35 | 3.73 
Macajna, second...... Avg. 1420. «3 136 412) | -32.35 241 124 365) fre foup Re 1ie 3226 
Macajna, first........ JulysiSs...527. 16 15 | 93.75 35 10 45 |. 2.331 0.62 | 3.00 
IGRLELAS Walnccces b ons, 6 July (Geen... 205 183 | 89.27 342 199 541 | 1.87 | 1.09 | 2.96 
RONLEL I. f.., Shs) See Tulye1Oe 25... 75 72 | 96.00 124 70 194 | 1.72 | 0.97 | 2.69 
PRGA tA ak cone Si BUSAS 3 ce chin 39 29 | 74.36 49 25 74 | 1.69 | 0.86 | 2.55 
SUELO T ott ssteysss. Aya thet ci PAs PRISE, See 1 1 | [100] 3 1 4/13 1 ie 
J, Seog, Regine eras Jaiy24e Ss: 14 8 | 57.14 21 5 26 | 2.62 | 0.62 | 3.25 
Mimgneny.. cies! S.26 ul yg ed eee 0: 16 16 |100 35 11 46 | 2.19 | 0.69 | 2.88 
PIONGCAS He hs. c a. Val yrSec. ss. 34 30 | 88.23 61 43 104 | 2.03 | 1.43 | 3.46 
ENO ATIA ae meee ee.) ee AUS I1O Tobie 29 25 71t86.21 56 33 SOs e224 stel32 | 3756 
Tea TUTE ih ly Poe pean Aa P20 5 Eee Ke SS, ae 222 192 | 86.48 408 237 cee EC Ee PA BO ees We Be 
Gemetérys nen. ssc. BU. Shine vee 39 37 | 94.87 89 33 12262. 41 at 028993230 
Presidio, inner........ yh Wy epee 65 60 | 92.31 110 Cit | £37 [et Sse be28. les. ik 
Presidio, outer>.... «0: Aug. 15, 16, 25 33 28 | 84.85 70 39 TOO ts 2250") 0390 1°3:;89 
WrOlete a rane et: July: LOAc6. 3. 19 12 | 63.16 29 9 Jo) | 2.4208 Ost9 Us oltf tf 2.00 
PACE AIDS bl ae Sa Aa ot PUP. Loe oe an 6 6 |100 11 6 Zo fede SoateL.00 | 2.83 | 2.83 
SSeS Zev al; “3 eae See, ey a AMS 22. on tae 86 74 | 86.05 104 88 1O7 ei Ie 40 P1901 2.59) 12.23 
pee AM cet Wale Be TS bees natn ced EEE Ages Mid bee 
Umatac Salonga...... aly tS en. 7 7 |100 7 7 14 | 1.00 | 1.00 | 2.00 | 2.00 
Umatac Pajom........ Vulyel 42 o.5:s 9 PPG ARS 16 9 PS iese ZR LT oOst o, 008 2.07 
Umatac Madog....... Vuly 14,155... . 7 5 | 41,43 TZ 6 18>} 2.40517 £520 | 3.60") 2.57 
IMerizon termes. Soo aes uly Gee ie. 2 | 1 1 [100] 4 2 6 | 4.00 | 2.00 | 6.00 | 6.00 
Summary), © = ors aes | Ss Aer ene | 2,384 | 2,046 | BGLII, eelel 2gaa2 || (0,005 "|P 1.82 | 1.14 | 2-960) Zic5t 

Among the individual arrays of embryonic contents there are certain anomalies 
where a capsule either lacks a germ within or it contains an unfertilized ovum; the 
aberrant condition can be detected only when developing young are also present 
