68 BRACHYPODELLA, S. STR. 



Cyl. morini MORELET, Test. Noviss., i, p. 11 (1849). PFR., 

 Monogr., iii, p. 578; Conchyl. Cab., p. 48, pi. 5, f. 24-26. 

 FISCHER & CROSSE, Miss. Sclent. Mex., i, p. 412, pi. 17, f. 12. 

 SOWERBY, C. Icon., xx, pi. 16, f. 136. PILSBRY, Proc. A. N. S. 

 Phila., 1892, p. 338. Holospira morini v. MARTENS, Biologia, 

 p. 285, with var. pulchella, pi. 17, f . 3, 3a ; salpinx, pi. 17, f . 5, 

 and sargi (Dec., 1897). Cyl. (Gongylostoma) pulchella 

 v. MART., Sitzungsber. d. Ges. nat. Freunde Berlin, 1886, p. 

 162. Cyl. salpinx TRISTRAM, P. Z. S., 1861, p. 231. 



B. morini differs from B. subtilis in the strong sculpture. 

 B. speluncce has the riblets even stronger and more widely 

 spaced, and is a rather more slender shell, with less convex 

 whorls. The initial three whorls are very finely, vertically 

 striate, as in B. speluncce. 



The two measurements first given above are from specimens 

 received from Morelet, one of which is drawn in fig. 6. The 

 smaller specimen would be called var. pulchella, but, after 

 examining specimens collected by Morelet and Sarg in Guate- 

 mala, and Rovirosa in Tabasco, I believe that none of the so- 

 called varieties of this species have any racial characters. 

 They are merely individual variations. Entire specimens from 

 S. Juan Bautista, Tabasco, have a diameter of about 2.2 mm., 

 and vary in length from 14 mm., with 21 whorls, to 12.5 mm., 

 with 193/2 whorls. About three apical whorls are brown and 

 delicately costulate vertically. Truncate shells from the same 

 place measure 11 to 12.7 mm. long, and retain 12 to 14 whorls. 



The form pulchella Martens measures 10.5 mm. long, 2.5 

 wide and has 13 whorls remaining (pi. 6, figs. 1, 2). 



Form sargi Martens has the last whorl but slightly pro- 

 duced, the lip being nearly appressed to the penultimate 

 whorl ; 1. 12.5, diam. 2.5 mm., 15 whorls remaining. 



Form salpinx Tristr. (pi. 6, fig. 3) has 16 whorls left, and 

 measures 1. 14.5, diam. 2.5 mm. One of the two typical speci- 

 mens differs from morini " in having a pure white varix on 

 the fifth and sixth whorls before the last, one just above the 

 other, and a less distinct varix on the following whorl, 

 immediately below the others; its general color is a dull 

 ashy-gray. The second specimen is pure white, probably 

 bleached " (v. Mart.). 



