CLASS GASTROPODA 
287 
lis instructa, curvatis, sinu planato; marginibus acutis, fissuris circiter x. 
valvis terminalibus, una in utroque latere, intermediis; marginibus externis 
prominentibus; limbo palii piluloso, sinpulis parvis, erectix, planatis. (Car¬ 
penter.) 
Shell ovate, elevated, brown-olive or maculated with whitish and bluish. 
Intermediate valves strongly mucronate, interstices curved, margins some¬ 
what rounded. Posterior valve depressed, excavated, the mucro small, 
superior; jugal and lateral areas indistinct; surface covered with granules 
and ornamented with small close points. Sutural plates large, curved; 
sinus flat; insertion plates acute, the intermediate valves with one, terminal 
valves 10 slits. Girdle hairy, spines small, erect, flat. Length, 5; breadth, 
3% ; alt., 1 mm.; divergence, 110°. (Tryon and Pilsbry, Manual of Con - 
chology .) 
Type in British Museum. Type locality, Mazatlan, Mexico. 
Range. Unalaska, Alaska, to Mazatlan, Mexico. 
Described as Ledidopleurus beanii Carpenter. 
Chaetopleura prasinata Carpenter, 1864 
Annals and Magazine of Natural History, series 3, 13:314. Tryon and Pilsbry, Man¬ 
ual of Conchology, 14:34. 
I. testa I. parallelo forma et indole simili, sed vivide viridi; ar. diag. 
seriebus bullularum irregulariter ornatis; ar. centr. clathris valde extanti- 
bus, acutis, jugo obtuso parallelis, utroque latere circ. xvi.; valv. term, 
seriebus bullularum circ. xviii.; mucrone submediano, inconspicuo; umbo- 
nibus haud prominentibus; tota superficie minutissime granulosa; intus 
valvarum lobis mediarum i.-term circiter x.-fissis; sinu lato, planato; sutu- 
ris planatis; limbo pallii anguto, minutissime squamulis furvicaceis cre- 
berrime instructo; interdum pilulis intercalatis. Long., 8; lat., 4 poll. 
(Carpenter.) 
Similar to parallela, but vivid green; lateral areas irregularly orna^ 
mented with series of tubercles. (Tryon and Pilsbry, Manual of Con¬ 
chology.) 
Type in United States National Museum. Type locality, Cape San 
Lucas, Lower California. 
Range. San Diego, California, to Cape San Lucas, Lower California. 
Chaetopleura parallela Carpenter, 1864 
Annals and Magazine of Natural History, 13:314. Tryon and Pilsbry, Manual of 
Conchology, 14:34; PI. 12, figs. 50. 
I. testa ovata, subelevata (ad angulum 120°) ; rufo-fusca, olivaceo 
tincta; valvis latis, marginibus parum rotundatis, interstitiis parvis; valvis 
[889] 
