GASTROTRKI 



()2Q 



25 (24) Seven (rarely fewer) large spines in tuo ui.idy sq>aratc.l irahsvcrse 

 ^^^^ C/iaclunolus spinulosus Slokc:, iHii?. 



Length 0.0675 to o 089 mm. I'sually four larRc spine in antcri.r 

 row and three m posterior. Some may Iw supprcsswl („r l.,Ht'> Icav- 

 ing three m front and only one in the center U-huM <ui-,ns o( 

 anterior row distinctly longer. ICgg o.o.i.}«; mm. 1,,. ' .,n 



one side with short hairs. The embryo esta|>e> in 11 .,»d 



thirty hours later the young individual shows an ovan 1 „ h 



the nucleus becomes conspicuous si.\ hours later. 



Fig. 975. C/iaetonolus spinulosus IthIots^A view. X 665. (After Stokes.) 



26 (21) Spines 



present on 

 body. . . 



head and neck much smaller than those 



on 

 27 



27 (28, 29) Four transverse rows of large dorsal spines on posterior region 

 of body. Also one large lateral spine on each side at caudal 

 process Chaetonotus acanthophorus Stokes 1887. 



Length 0.108 mm. Head and neck covered with short spin«. 

 Large spines on body in four cross rows of five each, not altrrnalinjt 

 so that they appear also as five longitudinal rows of four spines each. 

 The last lateral spine at the base of the caudal process is large and much 

 like those in the dorsal rows. Trenton, New Jersey. 



Fig. 976. Chaetonotus acanthomorphus '\n dors>a.\ \'\cy; ■ X 415- \Suhdork*i 

 spine. X about 1165. (After Stokes.) 



28 (27, 29) One transverse row of large spines just in front of the caudal end 

 of the body C/iai'io)iolus spinifcr Siokcs iSS-;. 



Length 0.1954 mm. Back and sides covered by 

 rounded imbricated scales, each with stout n-oirved 

 spine minutely furcate at tip. The f' -^ » 



smgle series immediately in front of tlu nw 



are much larger and stouter than tho- ' ol 



the body. Egg ornamentetl with provc.-v<-.s \Aiyu\K 

 in length and sha|)e in dilTerenl s|>et-imcns. Stoke* 

 distinguishes eggs with three se|wirate i>attcrn» rrM»ri-- 

 tively, 0.0705. o.o7,i5. and o 0793 mm. lon^. Trenton. 

 New jersey. 



Fig. 977. CItaelotuUus spinifrr. A •'J^ 



tion of egg. showing tnfi.l .in.l -i ■ 

 and surface asi^ecls. Highly ma>;i. 



